Metrohm 746 VA Trace Analyzer - Manual (Page 73)

3 Installation
746 VA Trace Analyzer / 747 VA Stand
3-46
3.10.5 Installation of Dosinos for rinsing the measuring vessel
It is possible to rinse the measuring vessel at the 747 VA Stand manually via dialog
page "STAND" or with the RINSE command by means of two 700 Dosinos with
50 mL Dosing units. To do this, the following accessories have to be ordered in ad-
dition to the standard equipment of the 747 VA Stand (see also section 9.4):
• • 2 ×× 2.700.0010 Dosino
•
• 1 ×× 6.5323.000 Rinsing equipment
The two Dosinos and the accessories have to be installed as follows (see Fig. 22):
1 Install accessories at 747 VA Stand
• Install accessories for rinsing and siphoning off at the 747 VA Stand acc.
to section 3.3.2 point 8 (see Fig. 10).
• Install 6.1456.210 measuring vessel at the 747 VA Stand.
2 Prepare containers
• Unscrew red filling connections from 6.1621.000 Containers.
• Using a funnel, add max. 10 L of rinsing solution (normally acidified
ultrapure water with 100 µ L conc. HCl/L) to the storage container through
its small vent opening.
3 Install Dosinos on containers
• Screw a 6.1618.050 Threaded adapter to each container.
• Screw a 6.1829.020 Suction tubing (L = 50 cm) to the bottom of the two
6.1567.250 Dosing units (see section 2.1 of the 700 Instructions for use).
• Screw the 6.1567.250 Dosing units to the 6.1618.050 Threaded adapters
screwed to the containers.
• Mount a 700 Dosino on each 6.1567.250 Dosing unit (procedure, see
section 2.3 of the 700 Instructions for use).
4 Setting up the containers
• Set up the waste and storage containers at the desired location next to
the 747 VA Stand (the max. possible distance is limited by the length
1.5 m of the connecting cables of the Dosinos).
5 Define rinsing Dosinos on 746 VA Trace Analyzer
• Switch on 746 VA Trace Analyzer using the mains switch 11 11.
• Select dialog page "SOLUTIONS".
• Add a new solution with Soln.name = RINSE and Pos. = Do.3 .
• Switch off 746 VA Trace Analyzer.
6 Connect rinsing Dosino to 747 VA Stand
• Using either a 6.1805.120 FEP Tubing (L = 1 m) or two 6.1805.120 FEP
Tubings and a 6.1808.000 Connecting sleeve, connect connection 1 of
the 6.1567.250 Dosing unit of the rinsing Dosino with the 6.1808.000
Coupling connected to the FEP tubing 90 90 and mounted on the 747 VA
Stand (see Fig. 10).
• Attach rinsing Dosino using the cable connected to the instrument to
socket 19 19 (Dos. 3) of the 746 VA Trace Analyzer (see Fig. 2 or Fig. 4).